Edging-machine.



A. E. MAYNAHD.

EDGING MACHINE.

APPLICATION mnu SEPT. 25. 191s.

Patented Deo. 5, 1916.

2 SHEETS-SHEET l.

A. E. MAYNARD.

EDGING MACHINE.

APPLICATION FILED sEPT.25. 191e.

l .,@KQW Patented Dec. 5, 1916.

2 SHEETS-SHEET 2.

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` @TATM AMINT ALBERT E. MAYNARD, 0F SOUTHBRIDGE, MASSACHUSETTS, ASSIGNORTO AMERICAN OPTICAL COMPANY, 0F SOUTHBRIDGE, MASSACHUSETTS, A VOLUNTARYASSOCIA- TION.

EDGING-MACHINE.

Specification of Letters Patent.

Patented Dee. 5, 19116.

Application filed September 25, 1916. Serial No. 122,114.

To all whom it may concern Be it known that I, ALERT E. MAYNARD, acitizen of the United States, residing at Southbridge, in the county ofWorcester and State of Massachusetts, have invented certain new anduseful Improvements in Edging-Machines, of which the following is aspecification. i

My inventionv relates to improvements in edging machines and hasparticular reference to an improvedl machine particularly adapted foruse in iinishing the edges of ophthalmic lenses.

'Ihe leading object of the present invention is the provision of noveland improved means for controlling the transverse movement of thegrinding stone or tool relative to the lens or lenses being ground.

Further objects of the invention include the provision of improved meansfor adjusting the width of the zone of movement of the stone or grindingmember, and of additional and improved means for adjusting andcontrolling the path traversed by reciprocations of the same amplitude,whereby either or both adjustments may readily be made to at all timescontrol the exact position of the stone and portion or portions of thestone operating upon the lenses.

Other objects and advantages of my improved construction should bereadily apparent by reference to the following speciiication taken inconnection with the accompanying drawings, and it will be understoodthat I may make any modifications in the specific details ofconstruction shown and described within the scope of the appended claimswithout departing from or exceeding the spirit of my invention.

Figure I represents a side elevation of a machine equipped with myimprovements. Fig. II represents an enlarged fragmentary perspectiveview illustrating my improvement. Fig. III represents a top plan-view ofthe machine indicating the variation accomplished by one of myadjustments. Fig. IV represents an enlarged view largely in sectionillustrating certain details of con-V the bearings 3 serving to slidablyand rotatably support the spindle or shaft 4f bearing the grind stone 5.Secured to the forward portion of the tub is a suitable lens holding androtating mechanism 6 for securing in position and rotating against thestone the lenses 7, while disposed at the rear of the machine is adriven shaft 8 provided with the barrel cam 9, the foregoing parts beingbut briefly described inasmuch as their speciiic construction forms noessential part of my present invention.

As has been mentioned, the shaft t for the stone is both rotatable inits hearings and also longitudinally slidable therein, this `slidingbeing effectedv by the shift lever 10 tion thereon as by the iiXedcollar 13 or other i suitable device. The opposite end of the lever 10is provided with a roller 11i riding in the groove 15 of the barrel cam,the lever being intermediately pivotally supported so that movementimparted to the one end through engagement of the barrel cam and rollerwill rock the lever and thus cause its opposite end to suitably shiftthe shaft 4.

My. present inventionrelates especially to the pivotal mounting orsupporting of this lever, particular attention in this connection beinginvited to Figs. II and IV of the drawings. y

Secured to the side of the tub 1 is the flange 1G having the outwardlyprojecting boss 17, in which is suitably secured as by threading, thestud 18, locked in position as by the nut 19, and .having the reducedouter portion 2O joining the main portion at the shoulder 21. Encirclingthe reduced portion is the exterior-ly threaded sleeve 22 having securedon its outer end the knurled operating portion 23 and locked againstoutward movement by the washer 241- secured to the end of the portion20, as by the screw 25 and engaging a portion of the outer end of thesleeve.

It will thus be noted, and particularly understood by reference to Fig.IV that the exteriorly threaded sleeve 22 is rotatably mounted on theouter portion of the stud 18, but being held between the shoulder 21 andwasher 211 is locked against any longistud.

Threaded onto the sleeve is the sleeve por-A Vtion V2,6 of the pivotbracket27, the sleeve Y to bear Vagainst the bracket sleeve V2G to lockthe parts in desired adjusted position.V

The bracket 27 is provided with the dovetail or Yunder-cut groove 3lslidably receiving the slide block 32 havingthe socket or aperture 33 toreceive the .pivot .pin 34 of the slide'member 35.Y

. rIlie slide has rising therefrom the pair ofarms 36, between. whichare vlocated the V nut 37 engaging the threaded bar 38 secured tothelugsV 39 rising from the shift lever l0. vIt'will thus be understoodthatV by rotation of the nut 37 it will be caused to travel back andforth along the rod 38 and .on account of its engagement between thearms 36 will carry with it the slide pivot pin V34 .and pivot block 32,thus varying the pointrof pivotance .about which the lever will swing. Ascale 40 on the lever coperating with a suitable indicator' or the likeV sleeve '22 in the one direction shifts the 4l on the slide serves toindicate the adjustment. Similarly, a scale42 carried by the llug 17serves to coperate with the indicator' line Vor edge` 43 on the bracketsleeve 2G to indicate the proper adjustment of the bracket.

YFrom' the foregoing description taken in y Y V- connection rwith'theaccompanying dra-w'- should be readily understood, while its adings, theconstruction of my improvement vantages should be best appreciatedbyreference to Fig. III. In Fig. III, I have indicated in dottedlines oneshifting of the stoner attained by adjustment ofthe bracket 27 throughrotation 'of the sleeve 22.V VBy reference to this it will be noted thatif the pivotfis'rleft'in Vthe same position or unadjusted and theseveral parts of they machine held againstrotatioii that turning of thebracket: 2'( toward theleft in Fig. III bearing VwithV itv the pivot,and thus causing a shifting ofthe lever,stoneV shaftrand stone Vtotheposition indicatedV by thedotted lines, lit being understood thatthis lateral shifting f ofthe pivot will cause all movement of the Ystone-to be nearerjone sideiof the machine Y than' the otherY but willinno wise aect the Yamount V.of lateral shifting ofthe stoneim-YVYparted to the 'stonethrouglithe' lever 1QY Qi'iponjrotation ofthefbarrelieam On the NYother hand, when itis desired to givea greaterorV less throwfto the stoiiethis resultl can be accomplishedby'shiftinglof the slide rear, the greater the amplitude of saidreciprocations.

It will thus be seen that by combined lateral and forward and backadjustments of the pivot any desired amount of transverse movement maybe imparted to the stone and r the positions of the movement controlledso that the lenses may act from center to both edges of the stone whenbut a single lens is in the holder, or the parts may be adjusted to takecare of the insertion of a number of lenses such as indicated by thedotted lines in Fig. III, so that the stone in its middle position willbe central with the quantity of lenses and the movement controlled sothat the lenses will travel just to the edges of the stone, or in anydesired relation thereto at the will of the operator, the graduations onthe scales 40 and 42 being if desired so figured that when theindicators are set at correspoi'iding points the stone will be properlyadjusted and have the proper movement to take care of the predeterminednumber of average thickness lenses indicated by the graduations ordesignations on the indicator.

It will further be noted that by proper use of my improved adjustingdevices it is possible to cause the lens to engage with a selectedportion only of the base of the stone, as when one portion of the stoneis worn away more than the other to wear the stone down equally, alsothat it is possible to quickly and easily adjust the stone to maximumamount of travel, as when it is desired to truc up the same.

' I claim:

l. In an edging machine, the combination with a longitudinally shiftablestone shaft, of an intermediately pivoted lever having Vone end engagingthe stone shaft and the other end engaging shifting mechanism, and meansfor laterally shifting the pivot `of the lever.

2. In a. lens edging machine, the combination with a longitudinallyshift-able stone shaft, of a pivoted rock lever for shifting fshiftablelongitudinally of the lever, and

means for longitudinally shifting said pivot.

4t'. In ai machine of the character dcscribed, the combination with ashift-able grind stone shaft, of a pivotedrock lever for shifting theshaft, a pivot for the lever shiftable longitudinally of the lever,means for longitudinally shifting said pivot7 and means for indicatingthe amount of shlft of the pivot.

5. In a machine of the character described, the combination With asupport and a transversely shiftable grind stone mounted on the support,of a rock lever for shifting the stone, a pivot about which the leverrocks, and means for shifting the pivot in a path parallel to the axisof the stone shaft, substantially as and for the purpose described.

G. In a machine of the character described, the combination With asupport and a transversely shiftable grind stone mounted on the support,of a rock lever for shifting the stone, a pivot about Which the leverrocks, and means for shifting the pivot at right angles to the axis ofthe stone shaft, substantially as and for the purpose described.

7. In a machine of the character described, the combination With asupport and a transversely shiftable grind stone mounted on the support,of a rock lever for shifting the stone, a pivot about Which the leverrocks, means for shifting the pivot in a path parallel to the axis ofthe stone shaft, and means for shifting the pivot at right angles to theaxis of the stone shaft, substantially as yand for the purposedescribed.

8. In a machine of the character described, including a supportingmember, a stone shaft journaled on said member for rotation andreciprocation, and means for shifting the stone, including a shift leverhaving one end rotatably engaging the shaft, means for automaticallyshifting the lever, and a variable pivot mounting for the lever, saidmounting including a laterally adjustable bracket having a guide Wayextending longitudinally of the machine, a pivot slidable in the guideWay, a slide secured to the pivot Vand movable along the bracket, saidslide having a portion embracing the shift lever to suitably connect thelever and pivot, and means for controlling the relative movement of theslide and lever.

9. An edging machine, including a support or tub, a guide memberprojecting laterally from the tub, a bracket slidably mounted on' theguide member, means for relatively shifting the bracket and guide memberand for locking the parts in desired relatively adjusted position, aslide pivotally and slidably mounted on the bracket and movable at rightangles to the direction of movement of the bracket, a shift leverslidably mounted on the slide, means for securing the lever, and slidein desired relatively adjusted position, means for rocking the lever, astone shaft mounted on the support and connections between the shaft andlever for reciprocating the shaft upon rocking of 'the lever.

l0. In a device of the character described, the combination vvith aslidable stone shaft and a lever for shifting the shaft, of a pivot forthe lever, a bracket engaging the pivot, means for laterally shiftingthe bracket and pivot to vary the movement of the lever and stone, andmeans for indicating the effect of shifting of the bracket.

1l. In a machine of the character described, the combination With ashiftable stone shaft, of a cam member for automatically shifting theshaft, a lever operatively connecting the cam and shaft for actuatingthe latter, a slide on the pivot having a pivot engaging a portion ofthe stone support, and means for shifting the slide along the lever tovary the pivot point of the lever, substantially as and for the purposedescribed.

In testimony whereof I affix my signature in the presence of twoWitnesses.

ALBERT E. MAYNARD.

Witnesses E. M. I-InLvoRsnN, E. M. LAFLER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner oi Patents, Washington, D. G.

